IC693PRG300RR 模擬輸入的配線的要求
1、使用屏蔽雙絞線,但不連接屏蔽層。
2、當(dāng)一個輸入不使用的時候,將V IN 和COM端子短接。
3、模擬信號線與電源線隔離 (AC 電源線,高壓線等)。
4、當(dāng)電源線上有干擾時,在輸入部分和電源單元之間安裝一個慮波器。
5、確認(rèn)正確的接線后,首先給CPU單元上電,然后再給負(fù)載上電。
6、斷電時先切斷負(fù)載的電源,然后再切斷CPU的電源。
PLC編程算法(3)——脈沖量的計算
脈沖量的控制多用于步進(jìn)電機(jī)、伺服電機(jī)的角度控制、距離控制、位置控制等。以下是以步進(jìn)電機(jī)為例來說明各控制方式。
1、 步進(jìn)電機(jī)的角度控制。首先要明確步進(jìn)電機(jī)的細(xì)分?jǐn)?shù),然后確定步進(jìn)電機(jī)轉(zhuǎn)一圈所需要的總脈沖數(shù)。
計算“角度百分比=設(shè)定角度/360°(即一圈)”
“角度動作脈沖數(shù)=一圈總脈沖數(shù)*角度百分比”
公式為:
角度動作脈沖數(shù)=一圈總脈沖數(shù)*(設(shè)定角度/360°)
IC693PRG300RR
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IC693PRG300RR